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Pyricularia Leaf Spot

Pyricularia grisea (Cke.) Sacc

Symptoms: Lesions on foliage are elliptical or diamond shaped, approximately 2.5-3.5 × 1.5-2.5 mm. Lesion centers are grey and water soaked when fresh but turn brown on drying. Lesions are often surrounded by a chlorotic halo, which turns necrotic, giving the appearance of concentric rings.

Seed transmission: Ahmed and Reddy (1993) have suggested that seed infection occurs. However, note that in the "Head Mold" section, isolation of P. grisea from seed has never been reported by other researchers (table 4). Transmission to seedlings has not been demonstrated.